Particle segregation model



FIG. 1 is an oblique view of a preferred embodiment showing the front, left side and top of the model;

FIG. 2 is a top view of the embodiment of FIG. 1, the bottom view being identical thereto;

FIG. 3 is a front elevation of the embodiment of FIG. 1; and,

FIG. 4 is a left side elevation of the embodiment of FIG. 1, the right side elevation being identical thereto. 

The ornamental design for a particle segregation model, as shown and described. 